Loss of the Normal Law due to Multiple Failures

TASK 27-90-00-810-826-A
Loss of the Normal Law due to Multiple Failures

1. Possible Causes

2. Fault Confirmation
Subtask 27-90-00-710-050-A

A. Not applicable, you cannot confirm this fault on the ground.

3. Fault Isolation
Subtask 27-90-00-810-074-A

A. Get access to the POST FLIGHT REPORT on the CFDS menu page, then to the PREVIOUS LEGS REPORT on the EFCS1 menu page.
(1) In the POST FLIGHT REPORT and in the PREVIOUS LEGS REPORT, read the maintenance message related to one of these items:

SFCC
Radio Altimeter
Pedal Position from ELACs
ADR (class 2)
IR (class 2)
AOA (class 2)

(2) Use these messages and relate them to the F/CTL maintenance status to find the related trouble shooting procedure.Then do the trouble shooting procedures related to each maintenance message.

[Rev.8 from Aug 2018] 2026.04.04 04:27:53 UTC